In SolidWorks, the Extruded Surface tool is provided to extrude a closed or an open sketch to create an extruded surface. An extruded surface is created using the Surface-Extrude PropertyManager. After creating the sketch in the sketcher environment, choose the Extruded Surface button from the Surfaces toolbar. The Surface-Extrude PropertyManager is displayed as shown in Figure 15-1. The preview of the extruded surface with the default value is also displayed in the drawing area. Using the drag handle provided in the drawing area, you can dynamically define the extrusion depth. Using the options available in the End Condition drop-down list, you can define the feature termination. The feature termination options available in the Direction 1 and Direction 2 rollouts and other options are the same as those discussed in part modeling. Figure 15-2 shows a closed sketch and Figure 15-3 shows the surface created by extruding the closed sketch. Figure 15-4 shows an open sketch and Figure 15-5 shows the surface created by extruding that open sketch.

rollout. The Distance spinner is used to define the percentage distance of extension of surface. The preview of the surface extension is displayed in the drawing area.

Untrimming by Selecting the Edges
You can also patch a trimmed surface using the Untrim Surface tool by selecting the edges of the trimmed portion of the surface. Invoke the Untrim Surface PropertyManager and select the edge of the surface along which you need to patch the trimmed surface. Now, select the edge, additional options in the Options rollout are displayed as shown in Figure 15-59. The options available in this rollout are discussed next.

Figure 15-59 The Options rollout displayed when the Edge is selected to be patched using the Untrim Surface tool Edge untrim type The Edge untrim type area is used to specify the options to patch the trimmed surface using the selected edges. The options available in this rollout are discussed next. Extend edges The Extend edges radio button is selected by default and it extends the edge to create a corner to untrim the trimmed surface. Connect endpoints The Connect endpoints radio button is used to patch the trimmed surface by joining the endpoints of the selected edge.

The Extended Surface tool is used to extend the surface along the selected edge or the selected face. To extend the surface, choose the Extended Surface button from the Surfaces toolbar. The Extend Surface PropertyManager is displayed as shown in Figure 15-63 and you are prompted to select a face or edge(s) and set the properties. There are two options of extending a surface, both of which are discussed next.

Figure 15-60 shows the edge to be selected for untrimming a surface. Figure 15-61 shows an untrimmed surface created using the Extend edges check box selected. Figure 15-62 shows the untrimmed surface created using the Connect endpoints check box selected.

Extending using Same surface Option
When you extend a surface using the Same surface option, the surface is extended by maintaining the curvature. To extend the surface using the Same surface option, invoke the Extend Surface PropertyManager. You will observe that the Same surface radio button is automatically selected in the Extension Type rollout. Now, you need to select the edge or the face that you need to extend. Note that when you select the face to extend the surface, the surface will extend equally in all the directions. Using the drag handle, extend the surface dynamically or set the extending distance in the Distance spinner. You can also use the other feature termination options available in the End Condition rollout. Figure 15-64 shows the edge selected to extend the surface. Figure 15-65 shows the preview of the surface being extended by selecting the edge with the Same surface radio button selected. Figure 15-66 shows the face selected to extend the surface. Figure 15-67 shows the preview of the surface being extended by selecting the face with the Same Surface radio button selected. Note If any edge of the selected surface is merged with another surface, the surface will not be extended along that edge.

Extending the Surface in the Linear Direction to An Existing Surface
To extend the surface in the linear direction to an existing surface by maintaining the tangency, invoke the Extend Surface PropertyManager and select the Linear radio button from the Extension Type rollout. Now, select the face or the edge along which you need to extend the surface and specify the feature termination using the End Condition rollout.